BMT - using a BionX motor with no-name battery and Kunteng display

[stancecoke]

We have developed and tested a module based on a STM32 "bluepill" board, that let's you drive your BionX motor without a BionX console and without a BionX battery. The first prototypes are soldered from various modules on a perfboard.

Everything is available as open source in english on github, code, schematic and wiki

Discussion in the german forum:
https://www.pedelecforum.de/forum/index.php?threads/bmt-bionx-motor-mit-no-name-akku-und-kunteng-display-betreiben.79599/post-1516083

[youtube]gEE0aXB8e7c[/youtube]

Now we are looking for someone, who can design a PCB layout, where the modules can be soldered to, without doing all the wiring manually, or even design a layout with the electronic components itself placed directly on the PCB ready for ordering at JLC or similar service providers.

I hope we can inspire someone to help.
I tried to do a PBC layout myself several years ago and decided, that this is not my main talent

regards
stancecoke

 

[stancecoke]

The second user has soldered his BMT now :thumb:

I've done the next test ride with an external BB torquesensor (E-Rider T9. Due to IGH3 Motor, that has no internal strain gauge) successfully 8)

regards
stancecoke

 

[stancecoke]

The first test ride with the internal strain gauge was successful :thumb:
Now we are looking for further improvements of the algorithm, how to process the strain gauge signal for a smooth but agile respond of the motor power to the riders force and cadence on the pedal. Suggestions are welcome!

regards
stancecoke

 

[fritz@fritzhauser.com]

Hi

I'm very interested in this project. How can I help? I'm mechanical engineer, no electrics. I' m realy experienced with 3D-CAD. Prefered German language

Fritz

 

[stancecoke]

Prefered German language

then you better join the german pedelecforum.de
There are much more active BionX users:
https://www.pedelecforum.de/forum/index.php?threads/bmt-bionx-motor-mit-no-name-akku-und-kunteng-display-betreiben.79599/

We (thanks to @reinosmart :thumb: ) have developed a PCB with THT meanwhile, the next step for a wider use of the development would be a SMD-board, fully assembled for plug and play, ready to be ordered at JLCPCB or a similar service. Or a guy, who builds and sells the PCBs in a proper housing....

regards
stancecoke

 

[Minitehnicus]

Hello !
I'm trying to insert the BMT project from github.com into my STM32 Workbench program, and I can't. The truth is that I don't know this program at all and I don't know how to proceed. What should I do? to compile and obtain a binary (or hexa) file? Can Bluepill be programmed with the help of the program, or with the Arduino IDE? I have the ST-Link V2 interface and the serial interface (FTDI) Can you help me?

 

[bricoboy111]

Hello guys,

First, thank you for your efforts. I appreciate those DIY projects to avoid the big brands to have the monopol of their product they sold even after years to be sure that the customer will have to come back to them. I would like to make my setup work also. I have hub motor wheel and the controller. I don't have the battery. I would like to know if the code you provided and their CAN address the definition and the data is compatible with the original LCD controller then I can simulate an 'OK' status for the battery.

 

[stancecoke]

I'm trying to insert the BMT project from github.com into my STM32 Workbench program

You can find a "How to" in the EBiCS wiki, it's a different project, but the procedure is the same.

Home

Free FOC firmware for Lishui E-Bike-Controllers. Contribute to EBiCS/EBiCS_Firmware development by creating an account on GitHub.

github.com

Especially this part.

I would like to know if the code you provided and their CAN address the definition and the data is compatible with the original LCD controller then I can simulate an 'OK' status for the battery.

The battery is the "brain" of the BionX system. You can't use the original BionX console with this project, it needs a Kunteng display.

But there is a different project, that replaces the original BionX battery:

XnoiB Akkuersatz für Bionx

Ich hatte hier schon ein paar mal von meinen Versuchen berichtet einen kompletten Akku-Ersatz für das BionX System zu entwickeln. Nachdem ich die ersten paar hundert km damit gefahren bin, will ich das hier mal kurz vorstellen. Die meiste Arbeit war natürlich erst einmal das Tracen und Verstehen...

www.pedelecforum.de

regards
stancecoke